CCRL 40/15
Downloads and Statistics
May 1, 2021
Testing summary:
Total: 1'240'737 games
played by 2'832 programs

White wins: 425'216 (34.3%)
Black wins: 312'397 (25.2%)
Draws: 503'124 (40.6%)
White score: 54.5%

Open source 32-bit 1-2-CPU engines

Comparing 347 engines!
94 best versions of selected engines played 3469 games with each other

CCRL 40/15 Rating List — Open source 32-bit 1-2-CPU engines (Quote)

Ponder off, General book (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 15 minutes on an Intel i7-4770k.
Computed on May 1, 2021 with Bayeselo based on 1'240'737 games
Please refer to the "about" page for comments on engine inclusion

Color legend: Commercial, Free, Open source, Private.
Bold font - tested with 200 games or more. Normal font - less than 200 games.

RankNameRatingScoreAverage
Opponent
DrawsGamesLOS
Elo+
1ChessBrainVB 3.743065+14−1448.4%+9.450.9%1494 
67.9%
 ChessBrainVB 3.723060+15−1551.2%−9.543.6%1423
86.2%
2Stockfish 2.2.2 32-bit3049+14−1461.4%−74.148.4%1619
57.7%
 Sting SF 4.63046+30−3045.4%+28.547.0%334
56.0%
 ChessBrainVB 3.703043+23−2351.1%−10.548.1%551
61.1%
 Stockfish 2.3.1 32-bit3039+17−1657.2%−45.150.5%1095
62.3%
 ChessBrainVB 3.663034+23−2351.5%−9.951.2%568
69.6%
 Sting SF 4.73026+21−2145.2%+28.550.0%658
49.3%
 Stockfish 2.1.1 32-bit3026+15−1562.8%−85.643.4%1426
55.6%
 ChessBrainVB 3.683024+21−2150.1%−0.954.3%654
56.6%
3IvanHoe 9.46h 32-bit3022+13−1355.8%−37.253.6%1668
83.2%
 Stockfish 2.0.1 32-bit3012+16−1664.0%−91.446.4%1214
80.0%
 Sting SF 2 32-bit3002+17−1751.3%−9.851.2%1062
54.5%
 Stockfish 1.9.1 32-bit3000+16−1663.9%−89.647.2%1320
83.6%
 Stockfish 1.8 32-bit2989+17−1664.5%−91.947.4%1178
57.0%
 ChessBrainVB 3.612986+27−2749.3%+4.347.7%421
63.2%
4Gull II b2 32-bit2981+18−1846.8%+18.852.6%960
56.0%
 ChessBrainVB 3.502979+24−2352.4%−16.346.7%553
53.9%
 Gull II 32-bit2977+18−1846.0%+22.457.1%854
53.6%
 Stockfish 1.7.1 32-bit2976+16−1664.2%−93.546.1%1352
97.3%
5Protector 1.5.0 32-bit2947+25−2545.2%+27.451.7%470
80.8%
 Stockfish 1.6.3 32-bit2933+16−1660.5%−65.948.0%1160
88.9%
 ChessBrainVB 3.312915+25−2552.6%−14.545.1%503
98.3%
 Gull 1.0a 32-bit2885+12−1246.0%+27.843.6%2314
83.3%
 Protector 1.4.0 32-bit2877+11−1145.8%+29.041.1%2844
54.6%
 Gull 1.1 32-bit2876+17−1747.4%+16.448.9%1051
50.5%
 Gull 1.2 32-bit2876+12−1245.9%+27.442.3%2340
58.9%
 ChessBrainVB 3.202873+25−2550.3%−2.647.4%489
57.4%
 Gull 0.12a 32-bit2870+21−2149.4%+2.744.8%717
69.9%
 Stockfish 1.5.1 32-bit2863+15−1554.8%−31.342.9%1530
89.3%
6Toga II 3.02850+16−1648.1%+10.542.9%1311
58.4%
 Gull 0.11a 32-bit2847+21−2146.8%+17.546.8%722
60.1%
7Booot 5.1.02844+10−1046.0%+27.241.3%3457
81.7%
8MinkoChess 1.3 32-bit2829+31−3146.0%+24.945.5%314
48.8%
 Stockfish 1.4 32-bit2829+16−1653.6%−23.149.1%1168
53.6%
 Protector 1.3.5 32-bit2828+15−1445.5%+29.245.8%1501
55.1%
 Cyclone xTreme Fury2827+19−1948.1%+10.748.8%811
54.2%
 Grapefruit 1.0 32-bit2826+9−948.4%+10.047.7%3991
47.3%
 Toga II 1.4.1SE2826+12−1250.0%+2.043.5%2395
57.3%
 Booot 5.02824+15−1545.4%+28.143.3%1366
50.5%
 Protector 1.3.4 32-bit2824+15−1545.7%+27.946.1%1368
53.9%
 Cyclone xTreme2823+13−1344.2%+38.145.8%2009
54.1%
 Cyclone 3.42822+21−2151.5%−8.847.2%685
51.3%
 ChessBrainVB 3.032821+25−2549.9%−1.640.8%512
52.9%
 Cyclone xTreme Rage2820+25−2548.4%+9.446.8%476
49.2%
 Toga II 1.4.1SE62820+23−2350.4%+0.545.1%567
62.8%
 Cyclone 2.22814+28−2849.1%+5.847.4%382
50.6%
 Toga II 3.1.2SE2814+17−1752.7%−18.343.4%1059
72.8%
 TheMadPrune 1.1.252805+24−2451.4%−10.048.0%504
56.0%
 Toga II 1.4 beta5c2802+23−2352.9%−18.845.9%564
52.0%
 Protector 1.3.1b 32-bit2801+23−2348.8%+9.143.6%608
64.8%
 Protector 1.3.2 32-bit2795+21−2145.7%+26.050.4%659
55.5%
 Stockfish 1.3.1 32-bit2793+25−2546.1%+25.141.4%512
60.9%
 Toga II 1.3.12789+11−1150.0%−1.042.1%2565
67.0%
 Grapefruit 1.0a32781+31−3148.1%+11.941.6%315
51.8%
 Cyclone 1.02780+32−3251.0%−7.139.3%300
51.5%
 MinkoChess 1.2 32-bit2780+14−1445.4%+31.540.6%1785
48.5%
 Stockfish 1.2 Default2780+21−2146.1%+24.144.5%679
76.8%
 Toga II 1.3.42767+28−2852.9%−18.242.1%411
55.5%
9Glaurung 2.1 32-bit2765+18−1846.3%+24.939.5%1067
51.1%
10Texel 1.01 32-bit2764+28−2852.2%−18.135.0%432
62.3%
 Toga II 1.2.1a 32-bit2759+12−1250.5%−6.239.2%2354
63.8%
 Glaurung 2.2 32-bit2755+24−2446.0%+24.541.4%565
64.5%
11Scorpio 2.7 32-bit2749+20−2049.0%+8.536.2%826
55.8%
 Stockfish 1.012746+31−3150.5%−5.743.8%322
54.0%
 MinkoChess 1.0 32-bit2744+32−3249.8%+1.141.1%314
57.0%
 MinkoChess 1.1 32-bit2740+27−2745.7%+26.340.9%455
54.4%
 Glaurung 2.0.1 32-bit2738+17−1747.2%+16.940.6%1196
57.4%
 Toga II 1.2 32-bit2735+25−2552.4%−18.437.2%511
57.8%
12Crafty 23.4 32-bit2732+20−2050.8%−5.240.4%861
52.5%
 Toga II 1.1a 32-bit2731+16−1652.8%−18.638.9%1275
63.5%
13Bison 9.11 32-bit2728+14−1448.5%+9.537.2%1810
75.3%
 Crafty 23.3 32-bit2715+32−3250.5%−4.041.4%309
68.3%
14‑15Critter 0.42 32-bit2706+25−2551.9%−13.241.1%494
47.9%
14‑15K2 0.992706+21−2246.2%+26.634.7%717
69.9%
 Booot 4.15.12697+30−3046.1%+23.542.1%359
49.1%
16DanaSah 8.32697+19−1948.2%+9.338.8%958
50.3%
 Glaurung 2 epsilon/5 32-bit2697+27−2748.1%+10.735.8%441
52.7%
 Crafty 23.2 32-bit2695+32−3247.8%+16.340.0%320
50.6%
 Fruit 2.12695+25−2551.5%−13.637.2%522
55.4%
 Booot 4.15.02693+14−1445.9%+26.644.9%1651
49.7%
 Scorpio 2.6 32-bit2693+31−3148.9%+7.741.7%321
53.1%
17Vajolet 2.482691+31−3148.9%+5.933.9%348
60.0%
 Crafty 23.1 32-bit2687+18−1846.2%+24.542.2%970
55.2%
18Bobcat 3.25 32-bit2684+31−3146.9%+23.032.2%351
67.8%
 MinkoChess 0.8 32-bit2674+33−3351.3%−13.441.5%301
59.3%
 ChessBrainVB 2.052669+23−2349.6%+1.436.1%609
50.4%
 Glaurung 1.2.1 Avalanche 32-bit2669+32−3252.1%−17.035.4%328
49.6%
 Scorpio 1.92669+31−3150.1%−3.834.0%362
53.0%
19Daydreamer 1.75 32-bit2668+17−1747.7%+13.941.2%1157
50.1%
 Scorpio 1.842668+32−3247.2%+8.529.9%354
51.9%
 Booot 4.14.02667+20−2051.4%−10.241.8%765
55.7%
 Glaurung 1.2.1 Crusader 32-bit2664+32−3251.6%−14.628.6%343
52.2%
 K2 0.952663+16−1648.2%+11.632.8%1297
49.2%
 Scorpio 2.5 32-bit2663+32−3249.5%+4.242.3%307
53.9%
 Scorpio 1.912661+13−1345.9%+28.436.8%1921
52.4%
 Vajolet 2.032661+24−2451.2%−11.833.8%562
50.6%
 Nawito 21032660+116−10768.5%−115.633.3%27
50.5%
 Bobcat 2.75 32-bit2659+24−2447.7%+15.036.9%558
59.5%
 Glaurung 1.2.1 32-bit2655+16−1646.4%+24.033.6%1265
50.1%
 Scorpio 2.02b2655+30−3047.3%+17.537.2%355
55.5%
 Scorpio 2.0 32-bit2653+16−1646.0%+28.434.3%1270
51.7%
 Scorpio 2.1 32-bit2652+34−3449.1%+4.838.2%280
57.8%
20Cyrano 0.6b17 32-bit2648+14−1448.6%+8.540.3%1661
58.2%
 Scorpio 1.812645+34−3449.8%+4.831.4%299
57.1%
 Scorpio 1.82641+20−2047.3%+18.435.7%869
53.3%
 DanaSah 7.32640+14−1449.4%+4.834.8%1709
58.3%
21RedQueen 1.0.0 32-bit2637+24−2451.6%−7.835.9%576
52.9%
 DanaSah 7.92636+19−2049.2%+4.527.3%944
48.8%
 Scorpio 2.05b2636+32−3250.5%−1.840.8%306
52.8%
 Glaurung 1.0.2 32-bit2635+17−1747.4%+19.832.0%1209
63.2%
22Cheng3 1.07 32-bit2630+26−2646.6%+22.131.7%517
48.8%
 Crafty 23.0 32-bit2630+29−2949.9%+1.441.3%380
52.2%
23‑24Delfi 5.12629+25−2546.3%+23.833.9%522
51.3%
23‑24Nawito 19062629+19−1949.9%+1.435.5%875
54.0%
 Glaurung 1.1 32-bit2627+32−3348.8%+10.032.1%324
56.4%
25Arasan 13.4 32-bit2623+30−3049.7%+1.434.8%374
52.8%
26Caligula 0.9g2622+20−2053.6%−27.529.8%866
55.5%
 Bison 9.62619+23−2351.3%−13.233.9%635
51.9%
27Phalanx XXV2619+15−1549.6%+2.232.3%1501
52.3%
 DanaSah 7.02618+26−2651.3%−9.937.8%479
52.0%
 Arasan 14.1 32-bit2617+33−3349.0%+4.533.3%309
51.3%
 Bison 9.8 32-bit2616+33−3249.8%−1.033.7%309
49.6%
 K2 0.912616+15−1549.0%+7.232.9%1497
67.1%
 Arasan 13.2 32-bit2608+32−3251.0%−5.738.5%312
51.6%
28Betsabe II 20202607+25−2550.3%−3.131.7%543
54.7%
 DanaSah 6.502605+22−2249.7%+1.236.0%691
51.1%
 Scorpio 1.72605+32−3249.7%−0.238.1%310
53.7%
 DanaSah 6.802603+28−2850.5%−2.640.3%412
56.4%
 Delfi 5.02600+20−2047.5%+15.237.1%805
52.1%
 Nawito 18122599+20−2048.3%+12.333.0%892
50.1%
29Sloppy 0.2.2 32-bit2599+14−1448.1%+12.337.8%1775
55.9%
 Crafty 22.8 32-bit2597+32−3248.7%+6.435.9%315
57.9%
 Betsabe II 1.962593+21−2151.0%−6.926.4%828
60.6%
 Booot 4.13.12588+28−2849.4%+1.539.9%404
53.9%
 RedQueen 1.1.1 32-bit2586+33−3250.6%−0.735.7%308
51.0%
 Nawito 1.1d2585+28−2850.2%−2.236.7%401
51.4%
30CuckooChess 1.12 32-bit2584+25−2547.9%+15.629.8%561
51.7%
 K2 0.872584+18−1849.0%+5.734.7%1102
57.5%
 Crafty 22.4 32-bit2580+32−3248.1%+11.937.7%318
52.9%
 Arasan 13.1 32-bit2579+32−3247.9%+13.837.5%312
52.9%
 RedQueen 0.9.8 32-bit2577+22−2249.6%+5.327.7%730
55.1%
 Cheng3 1.04 32-bit2575+32−3250.2%−2.034.0%326
58.4%
 Bobcat 20110414 32-bit2570+31−3149.4%+2.341.5%325
50.4%
 DanaSah 5.072570+17−1749.9%−1.237.2%1191
49.5%
 Scorpio 2.2 32-bit2570+28−2847.1%+20.335.3%417
56.3%
31Brutus 8.05 32-bit2567+17−1749.1%+4.236.8%1142
53.8%
 CuckooChess 1.11 32-bit2566+29−2950.4%−3.334.1%384
49.2%
 Cyrano 0.52566+31−3150.5%−2.635.9%326
51.8%
 Arasan 12.3 32-bit2565+24−2446.8%+23.730.0%597
52.2%
 Cheng3 1.06 32-bit2564+30−3047.3%+15.935.9%357
52.4%
 Bobcat 20110220 32-bit2563+32−3248.7%+7.435.0%311
51.8%
 Nawito 20122561+56−5646.7%+23.933.0%106
52.9%
 Arasan 11.7 32-bit2559+32−3249.2%+5.736.0%308
48.8%
 Cheng3 1.05 32-bit2559+32−3248.0%+15.033.6%324
57.3%
 DanaSah 4.882556+22−2250.5%−3.833.9%676
58.2%
 DanaSah 5.002552+29−2948.5%+9.032.2%395
53.5%
 Crafty 21.6 32-bit2550+34−3447.8%+13.030.1%302
58.9%
 Betsabe II 1.842546+14−1448.3%+13.425.6%1851
55.7%
 Crafty 21.5 32-bit2543+32−3248.3%+13.428.5%344
52.5%
 DanaSah 4.662542+26−2648.1%+11.135.2%475
52.2%
 DanaSah 4.602541+25−2548.5%+10.135.1%513
50.1%
32Tucano 1.042541+30−3047.2%+17.136.5%359
53.6%
33Rodent 0.102539+33−3351.1%−10.631.9%313
51.6%
 Crafty 22.0 32-bit2538+33−3348.5%+9.631.9%304
49.9%
 Phalanx XXIV2538+20−2048.7%+7.227.3%887
56.4%
 Caligula 0.82535+20−2049.1%+7.226.3%938
53.4%
 K2 0.832534+27−2751.7%−12.333.3%474
52.0%
 Arasan 11.6 32-bit2533+33−3351.8%−12.732.6%304
52.7%
 Arasan 12.1 32-bit2531+33−3351.4%−11.727.3%326
50.3%
 CuckooChess 1.102531+31−3151.5%−11.634.5%330
58.4%
 DanaSah 4.242527+17−1751.5%−10.436.9%1128
67.5%
34EXchess 6.10b 32-bit2519+32−3249.4%+3.332.5%314
52.4%
 Crafty 20.14 32-bit2517+27−2747.4%+20.133.4%482
55.1%
 Brutus 7.02b2515+18−1952.0%−15.635.4%994
53.6%
 DanaSah 4.452514+29−2949.9%+1.238.4%378
48.7%
 DanaSah 5.062514+32−3249.5%+1.835.1%319
56.2%
 Crafty 20.13 32-bit2511+33−3348.7%+9.433.3%312
50.8%
 Arasan 10.0 32-bit2510+33−3349.0%+6.228.8%309
52.8%
 Betsabe II 1.752509+22−2251.8%−14.823.3%730
49.5%
 CuckooChess 1.092509+33−3351.6%−12.826.8%317
57.8%
 DanaSah 4.372504+32−3149.7%+2.338.3%321
53.5%
 Crafty 20.11 32-bit2502+34−3449.8%+4.030.0%307
50.6%
35Pawny 0.3.1 32-bit2502+33−3348.9%+8.128.7%310
51.9%
 Arasan 11.3 32-bit2501+33−3348.7%+7.830.9%301
54.9%
 Arasan 10.32498+23−2346.3%+27.030.4%652
55.9%
 Cheng3 1.03 32-bit2495+33−3350.6%−5.430.8%318
52.6%
36GreKo 9.2 32-bit2494+33−3349.7%+1.532.9%304
52.3%
 K2 0.752493+23−2352.4%−19.032.8%634
58.9%
37DoubleCheck 3.1 32-bit2488+34−3451.0%−8.324.8%306
50.7%
 Arasan 11.4 32-bit2487+34−3449.0%+8.328.5%305
50.4%
 GreKo 8.2 32-bit2487+26−2649.1%+5.733.8%506
62.3%
38Pepito 1.59 32-bit2481+24−2449.6%+1.634.0%583
58.1%
 Arasan 10.2 32-bit2478+23−2346.1%+30.828.1%684
59.8%
39BBChess 1.3b2474+23−2349.2%+5.737.9%589
52.6%
 BBChess 1.3a2473+25−2551.6%−12.930.5%528
54.1%
 Arasan 10.42471+20−2045.8%+29.729.8%866
54.6%
40Counter 1.22469+17−1748.2%+13.438.5%1139
62.7%
 Betsabe II 1.662465+22−2246.9%+22.528.2%728
49.7%
41Nemeton 1.812465+18−1848.2%+11.233.8%1003
52.3%
42Carballo 1.22464+22−2252.9%−19.030.4%690
52.4%
 Carballo 1.32463+25−2547.4%+18.031.0%561
53.2%
 Pawny 0.3 32-bit2461+33−3349.2%+3.934.3%303
52.9%
 Nemeton 1.82460+17−1751.9%−15.227.3%1250
59.3%
 Counter 1.12457+23−2350.8%−8.637.7%632
57.2%
 Nemeton 1.512454+22−2249.8%−0.928.8%732
55.8%
 Cyrano 0.32451+34−3449.2%+4.223.8%311
50.8%
 GreKo 8.0 32-bit2450+29−2950.6%−3.529.7%411
55.3%
 Arasan 9.52447+36−3647.3%+16.923.7%291
54.0%
43Typhoon 1.00-3482445+29−2948.8%+9.727.6%409
51.9%
 Betsabe II 1.472444+20−2049.9%+1.925.3%902
51.6%
 Arasan 10.12443+27−2746.8%+28.728.5%508
51.7%
 Cheng3 1.02b2442+33−3350.2%−3.930.4%312
52.6%
 K2 0.792441+29−2947.4%+18.630.6%402
52.3%
 Nemeton 1.62440+24−2446.4%+24.631.8%604
59.0%
 Critter 0.382435+32−3251.1%−9.033.4%320
50.4%
 Typhoon 1.00-3582435+17−1748.2%+11.531.1%1220
54.2%
44Murka 2 32-bit2433+30−3047.4%+18.426.3%400
56.6%
 GreKo 7.2 32-bit2429+33−3348.4%+9.835.5%304
51.5%
 DanaSah 3.632428+27−2748.4%+10.732.3%477
52.4%
 Arasan 9.22427+34−3446.1%+27.930.9%304
53.5%
 Nemeton 1.612425+28−2847.3%+17.932.3%421
56.6%
 DanaSah 2.852421+33−3349.0%+8.833.8%305
51.5%
45Kiwi 0.6d 32-bit2421+19−1948.2%+9.827.0%991
51.6%
 Nemeton 1.72420+18−1849.6%+0.725.2%1141
52.8%
 K2 0.712419+28−2851.4%−9.727.6%439
60.2%
 Pawny 0.2.2 32-bit2413+34−3448.8%+8.828.6%301
52.5%
 Typhoon 1.00-3142411+34−3450.2%+0.323.0%305
53.2%
46Diablo 0.5.12410+18−1848.2%+11.932.1%1098
56.3%
47RomiChess P3k 32-bit2408+19−1949.2%+5.133.0%906
61.5%
48Amy 0.87b2403+24−2449.4%+7.125.7%610
51.0%
 Cyrano 0.2f2403+32−3248.4%+13.632.9%316
49.1%
 Pawny 0.2.1 32-bit2403+31−3147.1%+20.225.5%373
54.3%
 Pawny 0.2 32-bit2401+29−2949.2%+5.330.8%396
56.1%
49Simplex 0.9.8 32-bit2398+30−3049.0%+5.031.2%359
57.0%
 Phalanx XXII2394+25−2450.1%−1.123.5%595
69.0%
 DoubleCheck 2.5.4 32-bit2384+33−3350.5%−3.928.6%318
51.2%
 RomiChess P3L 32-bit2383+33−3346.3%+28.433.4%314
49.2%
50Thor's Hammer 2.28 32-bit2383+22−2249.0%+7.228.8%730
59.3%
 GreKo 6.302379+33−3348.0%+13.331.6%307
55.9%
 Carballo 1.1.12375+32−3247.5%+19.327.4%340
52.9%
 Counter 1.02373+32−3250.3%−3.635.3%312
50.4%
 Typhoon 1.00-2852373+34−3449.5%+2.620.1%314
53.2%
 GreKo 7.02371+28−2846.3%+29.127.8%454
49.8%
51Ifrit m1.5 32-bit2371+27−2846.6%+25.029.1%453
54.9%
 GreKo 6.252369+33−3348.5%+9.131.5%308
56.3%
 Phalanx XXIII2365+32−3246.3%+23.924.8%351
50.9%
 GreKo 6.52364+26−2648.9%+7.931.5%495
62.8%
52OliThink 5.3.0 32-bit2359+21−2149.3%+4.225.0%827
56.4%
 Nemeton 1.412356+25−2547.6%+18.733.7%514
51.9%
 K2 0.672355+23−2352.7%−17.229.7%677
51.5%
 Nemeton 1.32355+31−3152.1%−17.933.5%340
52.8%
 Counter 0.82353+32−3248.6%+10.735.6%312
61.3%
 GreKo 5.92347+23−2446.6%+26.329.3%635
55.8%
 Ifrit m1.6 32-bit2344+32−3247.5%+15.135.0%314
52.4%
53Xpdnt 0907042343+33−3351.8%−13.929.0%314
62.4%
 Daydreamer 1.52336+22−2252.1%−18.334.3%722
60.0%
 Nemeton 1.12332+29−2947.5%+16.631.3%393
56.6%
54Amundsen 0.802329+17−1749.1%+6.729.2%1269
60.7%
 Simplex 0.9.7 32-bit2324+31−3148.6%+9.625.4%370
69.7%
 GreKo 5.52312+33−3350.7%−5.533.1%305
54.5%
 Nemeton 1.22310+26−2646.3%+23.228.7%516
63.3%
 Brutus 6.12302+34−3448.4%+8.325.0%312
51.1%
 Xpdnt 0809272302+29−2951.2%−9.024.8%428
55.6%
55Natwarlal 0.142299+19−1948.5%+11.325.0%1045
61.3%
 Pawny 0.1.62294+33−3352.1%−16.024.4%328
50.9%
 Natwarlal 0.122293+34−3449.4%+7.326.6%308
49.6%
 Nemeton 1.02293+30−3052.6%−17.927.4%383
71.6%
 Brutus 5.42280+34−3450.7%−4.629.1%302
51.8%
 GreKo 5.2.52279+34−3451.3%−12.326.6%297
81.6%
56Sungorus 1.4 32-bit2260+21−2148.2%+12.526.5%820
59.6%
 Sungorus 1.3 32-bit2255+34−3452.7%−16.024.3%301
53.4%
57RattateChess 1.0 Nosferatu2254+19−1949.9%+0.327.8%1036
53.1%
 Brutus 6.02252+35−3548.8%+5.422.6%301
51.3%
 EXchess 5.01b 32-bit2251+29−2946.5%+21.531.2%401
75.3%
58Feuerstein 0.4.6.12239+19−1949.1%+6.028.5%944
53.3%
 Betsabe II 1.08c2237+35−3549.2%+8.521.0%300
72.4%
 Vajolet 1.62.12223+34−3447.7%+11.728.4%310
55.7%
59‑60Bagatur 1.2d 32-bit2219+34−3446.8%+19.927.2%298
50.6%
59‑60Beowulf 2.4a 32-bit2219+19−1953.3%−25.625.0%1008
67.2%
61ZCT 0.3.24512211+27−2749.4%+4.125.5%478
53.2%
 Betsabe II 1.09c2209+34−3548.2%+12.319.8%308
56.4%
62Jazz 501 32-bit2206+29−2952.5%−18.228.5%418
57.9%
 RattateChess Bologna 20072202+25−2551.3%−9.925.0%588
53.2%
63MORA 1.0.02200+26−2651.6%−10.428.1%506
59.2%
 Carballo 0.82196+22−2247.2%+19.330.6%706
50.6%
 Jazz 444 32-bit2196+32−3250.3%−3.325.2%353
62.2%
 Amundsen 0.65.12188+34−3448.7%+8.323.9%305
50.5%
 Feuerstein 0.4.5.22188+37−3749.2%+8.924.7%255
50.1%
 K2 0.572188+33−3347.0%+22.325.8%314
56.9%
 MORA 1.1.02184+27−2845.3%+36.425.0%476
62.6%
 RedQueen 0.62177+30−3046.1%+28.219.9%418
53.0%
 Feuerstein 0.4.62176+38−3850.6%−2.418.5%259
52.1%
 Sungorus 1.22174+26−2652.4%−17.428.7%499
56.3%
 Pawny 0.132171+32−3252.2%−17.420.1%363
61.0%
 Simplex 0.9.3 32-bit2164+34−3448.9%+8.924.8%315
57.4%
 Betsabe II 1.052160+34−3445.2%+33.224.2%314
53.3%
 OliThink 5.1.92158+30−3046.6%+27.521.3%417
52.1%
 Bagatur 1.2b 32-bit2157+33−3446.2%+28.029.1%306
53.1%
64Chesley r323 32-bit2155+24−2448.9%+8.920.7%641
58.9%
 Ifrit j4.32151+28−2845.9%+28.129.5%440
68.7%
 K2 0.43f2140+33−3348.2%+12.021.3%338
54.2%
65Prophet 2.0 32-bit2138+19−1949.3%+4.724.0%1025
55.3%
66Parrot 07.01.162136+31−3146.6%+25.521.1%394
48.7%
 Parrot 07.07.222136+19−1947.3%+20.123.0%1047
72.8%
 Ifrit j4.22124+34−3445.5%+31.626.4%303
64.9%
 DoubleCheck 2.1 32-bit2115+33−3346.3%+30.821.8%362
54.1%
67ChessKISS 1.3a 32-bit2113+32−3347.0%+18.430.3%320
77.7%
 Carballo 0.52097+23−2347.1%+20.621.9%694
78.2%
 Ifrit j2.92081+34−3448.2%+11.821.3%314
51.0%
 Feuerstein 0.4.5.12080+38−3848.0%+12.925.8%248
51.7%
68AdroitChess 0.42079+22−2256.0%−56.015.3%858
92.8%
 ZCT 0.3.25002050+32−3246.2%+29.816.8%381
53.3%
69PLP 16615712048+22−2246.2%+27.624.2%768
59.7%
70Jabba 1.0 32-bit2045+21−2144.8%+38.125.0%839
85.2%
71Faile 1.4.42028+23−2355.2%−28.422.1%774
54.2%
72Slibo 0.5.12026+26−2645.5%+33.619.4%573
91.5%
73BibiChess 0.52001+24−2445.7%+31.426.5%607
61.3%
74Cupcake 1.01995+31−3145.5%+31.622.7%401
54.3%
75Schola 1.1.0 32-bit1993+26−2745.6%+32.425.1%514
68.9%
 AdroitChess 0.31984+25−2544.2%+46.018.5%626
85.0%
76Dabbaba 5.671965+25−2545.5%+33.626.4%557
65.7%
77Sissa 2.01958+23−2353.1%−22.830.1%678
56.4%
 Feuerstein 0.4.4.21955+29−2941.2%+92.018.7%518
49.2%
78Monik 2.2.3 32-bit1955+30−3044.4%+39.627.1%395
53.7%
79Wowl 1.3.81953+26−2745.4%+35.713.3%573
54.1%
80Smash 1.0.31951+26−2740.8%+74.517.8%574
69.0%
81Micro-Max 4.8 (DM-PII)1943+20−2048.3%+12.526.1%865
59.5%
 Dabbaba 6.521939+22−2248.6%+11.620.3%777
63.3%
82Eia 0.31934+20−2047.1%+22.724.4%914
71.0%
 Wowl 1.3.71925+25−2546.8%+24.911.7%630
75.9%
 Carballo 0.41910+32−3335.8%+104.034.8%342
55.7%
 Dabbaba 7.491908+12−1147.8%+16.719.9%3152
53.1%
 Jabba 130320121906+31−3139.1%+97.916.7%442
58.7%
83ChessterfieldCL i5a1902+24−2540.6%+73.320.4%657
68.4%
 Micro-Max 4.81892+28−2836.7%+103.424.7%493
78.0%
84CDrill 1800 build 41878+23−2341.4%+72.915.5%741
100.0%
85RataAeroespacial 0.2.11815+13−1342.5%+64.712.9%2478
100.0%
86TSCP 1.811692+20−2047.4%+22.017.0%1072
84.4%
87Spartan 1.01675+25−2563.5%−103.621.2%624
67.4%
88Philemon C1667+25−2562.3%−95.022.0%626
59.4%
89VanillaChess 2.6g1663+25−2561.5%−89.520.2%624
100.0%
90PolarChess 1.31574+25−2549.3%+3.716.9%629
56.3%
91Darky 0.5d1571+24−2443.5%+56.420.8%677
98.7%
92MSCP 1.6h1530+25−2544.0%+50.215.1%628
99.8%
93Apep 1.011479+25−2541.2%+72.410.1%683
100.0%
94BACE 0.461378+23−2421.5%+257.39.8%1027
 

Results matrix

Open source 32-bit 1-2-CPU engines (best versions only), top 12
#NameElo123456789101112
1ChessBrainVB 3.743065            
2Stockfish 2.2.2 32-bit3049  26 − 28
+8−10=36
−38
19 − 13
+11−5=16
−13
  33 − 5
+28−0=10
+72
    2.5 − 1.5
+1−0=3
−249
3IvanHoe 9.46h 32-bit3022 28 − 26
+10−8=36
+38
 21 − 10
+11−0=20
+54
20 − 10
+12−2=16
+22
 28.5 − 5.5
+23−0=11
+61
     
4Gull II b2 32-bit2981 13 − 19
+5−11=16
+13
10 − 21
+0−11=20
−54
         
5Protector 1.5.0 32-bit2947  10 − 20
+2−12=16
−22
         
6Toga II 3.02850      2 − 0
+2−0=0
+INF
     
7Booot 5.1.02844 5 − 33
+0−28=10
−72
5.5 − 28.5
+0−23=11
−61
  0 − 2
+0−2=0
−INF
 3.5 − 6.5
+1−4=5
−102
 6 − 0
+6−0=0
+INF
13.5 − 9.5
+9−5=9
−45
7 − 3
+5−1=4
+15
8MinkoChess 1.3 32-bit2829      6.5 − 3.5
+4−1=5
+102
  7.5 − 2.5
+6−1=3
+105
  
9Glaurung 2.1 32-bit2765            
10Texel 1.01 32-bit2764      0 − 6
+0−6=0
−INF
2.5 − 7.5
+1−6=3
−105
    
11Scorpio 2.7 32-bit2749      9.5 − 13.5
+5−9=9
+45
    29.5 − 22.5
+20−13=19
+28
12Crafty 23.4 32-bit2732 1.5 − 2.5
+0−1=3
+249
    3 − 7
+1−5=4
−15
   22.5 − 29.5
+13−20=19
−28
 
Performance color legend:
(Only pairs with at least 30 games)
-120 -100 -80 -60 -40 -20 0 20 40 60 80 100 120

LOS matrix

Open source 32-bit 1-2-CPU engines (best versions only), top 12
#NameElo123456789101112
1ChessBrainVB 3.743065 94.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2Stockfish 2.2.2 32-bit30495.6 99.8100.0100.0100.0100.0100.0100.0100.0100.0100.0
3IvanHoe 9.46h 32-bit30220.00.2 100.0100.0100.0100.0100.0100.0100.0100.0100.0
4Gull II b2 32-bit29810.00.00.0 98.6100.0100.0100.0100.0100.0100.0100.0
5Protector 1.5.0 32-bit29470.00.00.01.4 100.0100.0100.0100.0100.0100.0100.0
6Toga II 3.028500.00.00.00.00.0 73.387.9100.0100.0100.0100.0
7Booot 5.1.028440.00.00.00.00.026.7 81.7100.0100.0100.0100.0
8MinkoChess 1.3 32-bit28290.00.00.00.00.012.118.3 100.099.9100.0100.0
9Glaurung 2.1 32-bit27650.00.00.00.00.00.00.00.0 51.188.099.2
10Texel 1.01 32-bit27640.00.00.00.00.00.00.00.148.9 81.496.9
11Scorpio 2.7 32-bit27490.00.00.00.00.00.00.00.012.018.6 88.8
12Crafty 23.4 32-bit27320.00.00.00.00.00.00.00.00.83.111.2 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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Results table
Performance table
Score table
LOS table
Proportion of draws
Number of games
Number of connecting games
Percentage of connecting games
Score with common opponents
Score with all opponents
Performance with common opponents
Performance with all opponents
LOS with common opponents
LOS with all opponents

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Reference rating list:
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Created in 2005-2013 by CCRL team
Last games added on May 1, 2021